Elevator



(No Model.) 1 42 sheets-sheen 1.

' G. MITCHELL.

N. nuns. rhmmmmpher. wmv-gum. o.

(No Model.) 2 Sheets- Sheet 2.

G. MITCHELL.

' EL-EVATOR.

110.272,97@ Patented 11610.27, 1883.

wxmssses; yf gif 5 UNITED STATES PATENT OFFICE.

GOVE MITCHELL, OF LANGHORNE, PENNSYLVANIA.

ELEVATO R.

SPECIFICATION forming part of Letters Patent No. 272,970, dated February27, 1883.

Application led January 2, 1883. (No model.)

horne, Bucks county, Pennsylvania, have invented a new and usefulImprovement in Elevators, of which the following'is a specification.

My invention relates to elevators for raising, grain, coal, 8m., also todredging and excavating machines, and, in general terms, to allelevators which consist of `wheels supporting and giving motion toendless chains or wire ropes carrying buckets.

So far as I am aware, elevator-buckets have hitherto always beenattached to the outside of the endless chains or other carriersemployed, and have discharged their contents at the top only oftheelevators-a method ot' construction which necessitated the driving ofthe carrier at a high rate of speed in order that the contents of thebuckets should be discharged with impetus enough to carry them into oronto the depository provided.

My invention consists of apparatusf'or causing the buckets to dump theircontents at any required height; also, in an arrangement of the buckets.by suspending them between two opposing endless chains or wire ropes bymeans of eXibly-connected bails, which allow the buckets to be invertedand their contents discharged as the buckets ascend.

In the annexed drawings, Figure 1 is a front view, and Fig. 2 a sideview, of the complete elevator. Fig. 3 is a sectional elevation oftheinner face of the oft' side b of the elevator.

The main frame is composed of two similar f and f are the buckets. Theyareprovidcd with hails consisting of the short shafts g and g', whichproject from their sides, the arms h and h', and the shalt i. Theseshafts. have bearings in the chains or wire ropes e'and e.

j and j are pins or stops projectingfrom the sides of the buckets. Thearms h and h abut against these pins, and the springs lt k serve toconfine the arms of the bail between themselves and the stopsjj when thebuckets are in an upright position, as the bucket f is shown in Fig. 1.

m m mz m3 are L-shaped bars, bolted or otherwise secured to the parts aand b of the main frame by projecting beams '1t In.' fn? n3. The barsfm, m mz'fm3 constitute the ways upon which slide two adjustablecarriages-viz., an outer carriage, consisting of the two L-shaped plateso and o', rigidly united by the cross-bar fixed on the shaftw and thelatter on a shaft, y.' a' is a hand-wheel for operating the gears.

The plates o and g are cogged on their eX- terior edges, as shown inFig. 1,forming racks into which the spur-wheels o and o mesh. Twosimilar danges, one of them, a2, being shown, are formed on the oppositesides of the buckets..

a3 is a pulley by which power is applied to the apparatus. Y

Cross-rods (indicated at a4, Fig. 3) extend from one to the other of thelower pair of sprocket-wheels. These rods are separated by equalperipheral spaces, which correspond with the spaces intervening betweenthe points of suspension of the buckets.

a5 .is a flange extending across the exterior of the inside of thebuckets.

The drawings show but three buckets; but it is to be understood thatbuckets are attached to the chains or ropes, with intervals of spacebetween them equal to the peripheral distances between the cross-rods a4of the lower pair of sprocket-wheels.

Preparatory to operating the elevator the adjustable carriages, withtheir inclined planes t t', dumping-pins s s', and zigzag guides u u',

2 i j @were are, by the action of the spur-Wheels e e and bevel-gearsxx', (moved by the hand-Wheel a/,) raised or lowered to the height atwhich it is desired to have the buckets dump their contents. As thebuckets pass around betweenV released from the influence of thesesprings the flanges a2 ofthe buckets are caught by the dumping-pins s sand held until, bythe upward movement ot' the bucket, it is inverted andits contents dumped onto the chute a, Flg. 3. As the iianges a2 arereleased from the dumping-pins the bucket-pins a7 enter the zigzagguides u and a', as'shotvn in Fig. 3, causing the buckets to rightthemselves.

The suspension of the buckets between the endless chains by means ofilexibly-connected bails having bearings in said chains, as set forth,is necessary to enable the buckets to be freely inverted and righted bythe above-described action ot' the other parts as the buckets arecarried up by the chains.

The adjustable carriages may be held in position at the requiredelevation by thumbscrews or equivalent means.

The above-described adjustable carriages, divested of their inclinedplanes, dumpingpoints, and zigzag guides, may be employed in connectionwith the vertical ways upon which they slide, and the endless chains orWire ropes, when other modes of effecting the discharge of the bucketsat variable heights are used-as, for instance, when the buckets are madeeach with a hinged side through which they can discharge their contentswithout being inverted.

I claimy l. In elevators, the adjustable carriages hearing inclinedplanes, dumping-pins, and zigzag guides, a bucket having flanges a2,pins a7, and a flexible bail, with its confiningstops and springs, incombination with endless chains or Wire ropes, in the manner and for thepurpose substantially as set forth. Y

2. The adjustable carriages, consisting Vof plates o o', united, as bycross-bar p, and the plates q q', united, as by a cross-bar, r, incoinbination with upright Ways on which said carriages slide and theendless chains or Wire ropes, substantially as and for the purposesetforth.

GOVE MITCHELL..

Vitiiesses:

HARRY FALGE, J. E. SHAW.

